/*
 * Copyright 2008,2009,2010 Daniel Freitas
 *
 * This file is part of DMF Generic DAO.
 *
 * DMF Generic DAO is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser General
 * Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any
 * later version.
 *
 * DMF Generic DAO is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
 * details.
 *
 * You should have received a copy of the GNU Lesser General Public License along with DMF Generic DAO. If not, see
 * <http://www.gnu.org/licenses/>.
 */
package com.googlecode.dmf.genericdao;

import java.lang.reflect.Method;

import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;

import com.googlecode.dmf.genericdao.exceptions.DataPersistenceException;

/**
 * A DAO query executor is responsible to run queries based on the method called in the target DAO interface.
 * Implementing classes are responsible to define the semantics of how the query gets to be executed.
 *
 * @author <a href="mailto:daniel.mfreitas@gmail.com">Daniel Freitas</a>
 */
public interface DaoQueryExecutor {

    /**
     * Executes a query for the method in the specified DAO interface.
     *
     * @param invokedMethod
     *            The {@link Method} that has been invoked.
     * @param arguments
     *            The parameters of the query.
     *
     * @return The result of the query.
     *
     * @throws DataPersistenceException
     *             If there's an error while trying to execute the query.
     */
    @Transactional(propagation = Propagation.REQUIRED)
    public Object executeQueryForMethod(Method invokedMethod, Object... arguments) throws DataPersistenceException;
}
